| abstract |
Compounds having biological response modifying activity and their methods of production are described. The compounds have the formula:n wherein each X is (CH₂)n wherein 1 ≦ n ≦ 3;n where R⁴ is lower alkyl; CH₂S; or CH₂O; and R³ and R⁵, independently, are H, fluoro, nitro, amino, alkylamino, dialkylamino, arylamino, acylamido, carboxy, azido, lower alkoxy, trimethylsulphonyl, trifluoromethanesulphonyl, or lower alkoxycarbonyl, provided that when X is (CH₂)₂, R³ cannot be H; or a pharmaceutically acceptable salt thereof. |